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1 /* crypto/evp/p_seal.c */ | |
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | |
3 * All rights reserved. | |
4 * | |
5 * This package is an SSL implementation written | |
6 * by Eric Young (eay@cryptsoft.com). | |
7 * The implementation was written so as to conform with Netscapes SSL. | |
8 * | |
9 * This library is free for commercial and non-commercial use as long as | |
10 * the following conditions are aheared to. The following conditions | |
11 * apply to all code found in this distribution, be it the RC4, RSA, | |
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
13 * included with this distribution is covered by the same copyright terms | |
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
15 * | |
16 * Copyright remains Eric Young's, and as such any Copyright notices in | |
17 * the code are not to be removed. | |
18 * If this package is used in a product, Eric Young should be given attribution | |
19 * as the author of the parts of the library used. | |
20 * This can be in the form of a textual message at program startup or | |
21 * in documentation (online or textual) provided with the package. | |
22 * | |
23 * Redistribution and use in source and binary forms, with or without | |
24 * modification, are permitted provided that the following conditions | |
25 * are met: | |
26 * 1. Redistributions of source code must retain the copyright | |
27 * notice, this list of conditions and the following disclaimer. | |
28 * 2. Redistributions in binary form must reproduce the above copyright | |
29 * notice, this list of conditions and the following disclaimer in the | |
30 * documentation and/or other materials provided with the distribution. | |
31 * 3. All advertising materials mentioning features or use of this software | |
32 * must display the following acknowledgement: | |
33 * "This product includes cryptographic software written by | |
34 * Eric Young (eay@cryptsoft.com)" | |
35 * The word 'cryptographic' can be left out if the rouines from the library | |
36 * being used are not cryptographic related :-). | |
37 * 4. If you include any Windows specific code (or a derivative thereof) from | |
38 * the apps directory (application code) you must include an acknowledgement: | |
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
40 * | |
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND | |
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
51 * SUCH DAMAGE. | |
52 * | |
53 * The licence and distribution terms for any publically available version or | |
54 * derivative of this code cannot be changed. i.e. this code cannot simply be | |
55 * copied and put under another distribution licence | |
56 * [including the GNU Public Licence.] | |
57 */ | |
58 | |
59 #include <stdio.h> | |
60 #include "cryptlib.h" | |
61 #include <openssl/rand.h> | |
62 #ifndef OPENSSL_NO_RSA | |
63 #include <openssl/rsa.h> | |
64 #endif | |
65 #include <openssl/evp.h> | |
66 #include <openssl/objects.h> | |
67 #include <openssl/x509.h> | |
68 | |
69 int EVP_SealInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type, unsigned char **ek
, | |
70 int *ekl, unsigned char *iv, EVP_PKEY **pubk, int npubk) | |
71 { | |
72 unsigned char key[EVP_MAX_KEY_LENGTH]; | |
73 int i; | |
74 | |
75 if(type) { | |
76 EVP_CIPHER_CTX_init(ctx); | |
77 if(!EVP_EncryptInit_ex(ctx,type,NULL,NULL,NULL)) return 0; | |
78 } | |
79 if ((npubk <= 0) || !pubk) | |
80 return 1; | |
81 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0) | |
82 return 0; | |
83 if (EVP_CIPHER_CTX_iv_length(ctx)) | |
84 RAND_pseudo_bytes(iv,EVP_CIPHER_CTX_iv_length(ctx)); | |
85 | |
86 if(!EVP_EncryptInit_ex(ctx,NULL,NULL,key,iv)) return 0; | |
87 | |
88 for (i=0; i<npubk; i++) | |
89 { | |
90 ekl[i]=EVP_PKEY_encrypt_old(ek[i],key,EVP_CIPHER_CTX_key_length(
ctx), | |
91 pubk[i]); | |
92 if (ekl[i] <= 0) return(-1); | |
93 } | |
94 return(npubk); | |
95 } | |
96 | |
97 /* MACRO | |
98 void EVP_SealUpdate(ctx,out,outl,in,inl) | |
99 EVP_CIPHER_CTX *ctx; | |
100 unsigned char *out; | |
101 int *outl; | |
102 unsigned char *in; | |
103 int inl; | |
104 { | |
105 EVP_EncryptUpdate(ctx,out,outl,in,inl); | |
106 } | |
107 */ | |
108 | |
109 int EVP_SealFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) | |
110 { | |
111 int i; | |
112 i = EVP_EncryptFinal_ex(ctx,out,outl); | |
113 if (i) | |
114 i = EVP_EncryptInit_ex(ctx,NULL,NULL,NULL,NULL); | |
115 return i; | |
116 } | |
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